holmes



M. K. HOLMES.

GLASS FURNACE.

APPLICATION FILED JUNE 8.1914.

Patented Aug. 8, 1916.

2 SHEETS-SHEET I.

M. K. HOLMES.

GLASS FURNACE.

APPLICATION FILED JUNE 8. 1914.

Patented Aug. 8, 1916.

2 SHEETS-SHEET 2- INVENTOR AY/n W'Zf 19%; mes

WITNESSES ATT IVE) ware. In such prior furnaces it has EUNTTEU STATES PATENT @FFTCE.

MING! K. HOLMES, 0F MUNCIE, INDIANA, ASSIGNOB T0 HEMINGRAY GLASS COMPAhTY,

0F MUNCIE, INDIANA, A

CORPORATION DF KENTUCKY.

crises-summon.

Specification of Letters IlP-atent.

Patented Aug. 8, 1916.

Application filed June 8, 1914. Serial No. 843,658.

dition such that successively cut off portions of the stream might be manipulated in the formation of commercial articles of glassbeen customary to form, at the delivery end of the furnace, a .comparatively small extension which has been commonly called a dog house. This extension has been in the form of a comparatively small chamber, the floor of which was elevated considerably above the floor; of the main body of the re fining end of the furnace and, while considerably wider than the delivered stream, was nevertheless quite narrow as compared with the furnace and of such form that the hot gases from the furnace could not well penetrate into the extension, and it has been necessary heretofore to supplementally heat the interior of the extension, therein, by means of jected into the chamber through the wall thereof. While such a practice has been fairly satisfactory, difficulties have been experiencedboth because of the variations in the temperatures of the glass in different parts of the extension and alsobecause of the deposit of carbon particles upon the surface of the glass resulting from-incomplete combustion ofthe fuel. Variation in temperatures due to the fact walls were comparatively distant from the outlet opening and, as the major flow took place along lines converging from the refining chamber toward the outlet opening, there would be stagnant portions of the glass in the chamber which could only be heated with great difficulty and much expenditure of fuel. a

The object of my present invention is to produce a furnace especially designed for the delivery of streams of glass in the best possible condition for molding into articles and to mainthe glass to the out-1 let opening of the furnace in a uniform 0911- and the glass I gas or oil flames .pro-

that the chamberone or more continuous" tain the stream or streams at the lowest possible temperatures consistent with proper working of glass after it is discharged from the furnace.

The accompanying drawings illustrate my invention.

Figure 1 is a lon'gitudinalvertical section on line 2-2 of Fig. 1; and Fig. 3 a transverse sec- "tion on line 3-3 of Fig. 1.

In the drawings, 10 indicates the bed of a glass furnace, 11 the feed or receiving end, 12 the receiving end wall, 13 the arch, and 14; the refining bridge, all of usual form. At the delivery end of the refining chamber 15, however, I provide an elevated floor 16 which, however, is below the normal level of glass in the furnace by several inches. This floor 16 is extended from the main body of the furnace by a suflicient amount to accommodate machines which are to be served from the furnace and at its forward end is erected the delivery end wall 17 the arch 13 being carried clear to this wall. As many delivery openings may be provided as desired within the capacity of the furnace and in Fig. 2 I have indicated three of such delivery openings, that number be- 11 of Fig. 2; Fig. 2 a plan on line ing about the capacity of the furnace shown and upon the floor forms 16, 16, the tops of which rise slightly above the normal level of glass and the ad- 'acent edges of which are slightly inclined and separated so as to form between their substantially vertical adjacent edges slightly tapered channels 18 which connect with openings 19 end wall 17, the openings 19 having alvertical' extent several times greater than the height of the platforms 16.

Over theiouter end of each opening 19 I place a How block 20 which is conveniently semi-cylindrical and provided upon' its inner vertical face 21 which registers with and completes the outer end of the opening 19 and is not very much larger than the delivery opening 22 which is formed in its lower wall. In its 16 I erect several plat formed through the deliverythe block 20 is formed an inspection opening v 24 in which is normally placeda stopper or" the 'iiormal of glass, a delivery end wall fvrive at the outlet openings 22'in1.substanr plug 25. Block 20 may be pointed lnto or to Wall 17 in any deslred manner and in practice it is advisable tow also equip the lower end of this flow block with a metal nels 18 to the delivery openings 22. W-ithout.

the possibility of any material areas of staginant glass close to the end wallsofthefurnace. The entire refining chamberlies so well in front of the delivery endof wall 17 and, as the arch 13 extends for a' consid erable distance beyond this refining chamber, the entire mass of glass in the refining chamber is of substantially uniform tem perature andconsistency and,- as the1arch13 alsoextends over the entire lengthjof-the platforms 16, these platforms: arealso of the same temperature asjthe body of: glass in the refiningchamber and consequently fore, produce no chilling efl'ecti uponath'e streams. As a consequence, the streams an tially the same condition and at the.sam'e temperature as the glass in the refining chamber and, while the'reis some chilling;

immediately adjacent the outlet opening yet nevertheless the hot gases, because of; the height of the openings 19 in'the delivery end wall, have free throughout their entire length -and.,-qas they are comparatively narrow, there is=no difiiculty in maintaining the desireduniformity, in the inner stream throughoutwitsentire length. 4 3;;

I claim as my invention:

1. A glass furnace comprising a-Jnairr a fioorat'thedelivery end otthe main bed elevated above the maln bedan'd lying below Copies 01 thispatent may be obtained team; each, biaddressing the Commissioner otPatents, v

a Y \wWeh tea -Q H. i

play upon the streams 'block provided-with a delivery chamber arvranged, to cover said opening, said flow block having" a delivery opening formed through its bottom, and platforms erected .uuponrsaid eleyatedfloor with their-upper JIEELCGSuabQYB thenormal glass'level and laterally separatedto form a channel regis- H g iththe opening in the delivery end hot the Wall. 1 t x r sen.

2. A glass furnace comprising a main bed,

aifloor atzthe delivery end of the main-bed lowthe normallevel of glass, a delivery end .wall erected at the delivery end of said ele- .'elevated above the main bedand lying be.

lvated floorr and havlng a delivery opening ,Qf material vertical extent therethrough, a.

flow blockprovided with a delivery chamber ,arranged to" cover said opening, said flow .block havinga delivery opening formed I throughdtsbotto'm, and platforms erected upon said elevated floor 'and'laterally sepaeach stream of glass inthe channel ;185. is flanked by Walls which are ofmthe,

' same temperature as the'glass-and, .thererated to form a channel registering with the openlng in the delivery end of thewall.

-, 3. A glassfurnace comprising'a main bed, 1 a floorat the delivery end of the main bed elevated above "the main bed and lying below flOW block'provided with a delivery chamthrough its bottom.

vand fourteen.

Tw l 9 5 f i, M

JAMES G. MENDENHALL'," v QHAs. E; HAWK.

.June, A. D one thousand nine-hundred.

,ber; arranged to cover said opening, said flow block having a delivery opening formed 1 i. y In witness whereof, I have hereunto set hand'at Muncle, Indiana, this third day a H MIfiOT -KLHOLMES 3 P 

